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|
/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* This Program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*
* repl5_consumer.c - consumer plugin functions
*/
/*
* LDAP Data Model Constraints...
*
* 1) Parent entry must exist.
* 2) RDN must be unique.
* 3) RDN components must be attribute values.
* 4) Must conform to the schema constraints - Single Valued Attributes.
* 5) Must conform to the schema constraints - Required Attributes.
* 6) Must conform to the schema constraints - No Extra Attributes.
* 7) Duplicate attribute values are not permited.
* 8) Cycle in the ancestry graph not permitted.
*
* Update Resolution Procedures...
* 1) ...
* 2) Add the UniqueID to the RDN.
* 3) Remove the not present RDN component.
* Use the UniqueID if the RDN becomes empty.
* 4) Keep the most recent value.
* 5) Ignore.
* 6) Ignore.
* 7) Keep the largest CSN for the duplicate value.
* 8) Don't check for this.
*/
#include "repl5.h"
#include "repl.h"
#include "cl5_api.h"
#include "urp.h"
static char *local_purl = NULL;
static char *purl_attrs[] = {"nsslapd-localhost", "nsslapd-port", "nsslapd-secureport", NULL};
/* Forward declarations */
static void copy_operation_parameters(Slapi_PBlock *pb);
static int write_changelog_and_ruv(Slapi_PBlock *pb);
static int process_postop (Slapi_PBlock *pb);
static int cancel_opcsn (Slapi_PBlock *pb);
static int ruv_tombstone_op (Slapi_PBlock *pb);
static PRBool process_operation (Slapi_PBlock *pb, const CSN *csn);
static PRBool is_mmr_replica (Slapi_PBlock *pb);
static const char *replica_get_purl_for_op (const Replica *r, Slapi_PBlock *pb, const CSN *opcsn);
/*
* XXXggood - what to do if both ssl and non-ssl ports available? How
* do you know which to use? Offer a choice in replication config?
*/
int
multimaster_set_local_purl()
{
int rc = 0;
Slapi_Entry **entries;
Slapi_PBlock *pb = NULL;
pb = slapi_pblock_new ();
slapi_search_internal_set_pb (pb, "cn=config", LDAP_SCOPE_BASE,
"objectclass=*", purl_attrs, 0, NULL, NULL,
repl_get_plugin_identity (PLUGIN_MULTIMASTER_REPLICATION), 0);
slapi_search_internal_pb (pb);
slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_RESULT, &rc);
if (rc != 0)
{
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "multimaster_set_local_purl: "
"unable to read server configuration: error %d\n", rc);
}
else
{
slapi_pblock_get(pb, SLAPI_PLUGIN_INTOP_SEARCH_ENTRIES, &entries);
if (NULL == entries || NULL == entries[0])
{
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "multimaster_set_local_purl: "
"server configuration missing\n");
rc = -1;
}
else
{
char *host = slapi_entry_attr_get_charptr(entries[0], "nsslapd-localhost");
char *port = slapi_entry_attr_get_charptr(entries[0], "nsslapd-port");
char *sslport = slapi_entry_attr_get_charptr(entries[0], "nsslapd-secureport");
if (host == NULL || ((port == NULL && sslport == NULL)))
{
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
"multimaster_set_local_purl: invalid server "
"configuration\n");
}
else
{
local_purl = slapi_ch_smprintf("ldap://%s:%s", host, port);
}
/* slapi_ch_free acceptS NULL pointer */
slapi_ch_free ((void**)&host);
slapi_ch_free ((void**)&port);
slapi_ch_free ((void**)&sslport);
}
}
slapi_free_search_results_internal(pb);
slapi_pblock_destroy (pb);
return rc;
}
const char *
multimaster_get_local_purl()
{
return local_purl;
}
/* ================= Multimaster Pre-Op Plugin Points ================== */
int
multimaster_preop_bind (Slapi_PBlock *pb)
{
return 0;
}
int
multimaster_preop_add (Slapi_PBlock *pb)
{
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
int is_legacy_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
/* If there is no replica or it is a legacy consumer - we don't need to continue.
Legacy plugin is handling 4.0 consumer code */
/* but if it is legacy, csngen_handler needs to be assigned here */
is_legacy_operation =
operation_is_flag_set(op,OP_FLAG_LEGACY_REPLICATION_DN);
if (is_legacy_operation)
{
copy_operation_parameters(pb);
slapi_operation_set_csngen_handler(op,
(void*)replica_generate_next_csn);
return 0;
}
if (!is_mmr_replica (pb))
{
copy_operation_parameters(pb);
return 0;
}
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
if(is_replicated_operation)
{
if(!is_fixup_operation)
{
LDAPControl **ctrlp;
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_pblock_get(pb, SLAPI_REQCONTROLS, &ctrlp);
if (NULL != ctrlp)
{
CSN *csn = NULL;
char *target_uuid = NULL;
char *superior_uuid= NULL;
int drc = decode_NSDS50ReplUpdateInfoControl(ctrlp, &target_uuid, &superior_uuid, &csn, NULL /* modrdn_mods */);
if (-1 == drc)
{
slapi_log_error(SLAPI_LOG_FATAL, REPLICATION_SUBSYSTEM,
"%s An error occurred while decoding the replication update "
"control - Add\n", sessionid);
}
else if (1 == drc)
{
/*
* For add operations, we just set the operation csn. The entry's
* uniqueid should already be an attribute of the replicated entry.
*/
struct slapi_operation_parameters *op_params;
/* we don't want to process replicated operations with csn smaller
than the corresponding csn in the consumer's ruv */
if (!process_operation (pb, csn))
{
slapi_send_ldap_result(pb, LDAP_SUCCESS, 0,
"replication operation not processed, replica unavailable "
"or csn ignored", 0, 0);
csn_free (&csn);
slapi_ch_free ((void**)&target_uuid);
slapi_ch_free ((void**)&superior_uuid);
return -1;
}
operation_set_csn(op, csn);
slapi_pblock_set( pb, SLAPI_TARGET_UNIQUEID, target_uuid);
slapi_pblock_get( pb, SLAPI_OPERATION_PARAMETERS, &op_params );
/* JCMREPL - Complain if there's no superior uuid */
op_params->p.p_add.parentuniqueid= superior_uuid; /* JCMREPL - Not very elegant */
/* JCMREPL - When do these things get free'd? */
if(target_uuid!=NULL)
{
/*
* Make sure that the Unique Identifier in the Control is the
* same as the one in the entry.
*/
Slapi_Entry *addentry;
char *entry_uuid;
slapi_pblock_get( pb, SLAPI_ADD_ENTRY, &addentry );
entry_uuid= slapi_entry_attr_get_charptr( addentry, SLAPI_ATTR_UNIQUEID);
if(entry_uuid==NULL)
{
/* Odd that the entry doesn't have a Unique Identifier. But, we can fix it. */
slapi_entry_set_uniqueid(addentry, slapi_ch_strdup(target_uuid)); /* JCMREPL - strdup EVIL! There should be a uuid dup function. */
}
else
{
if(strcasecmp(entry_uuid,target_uuid)!=0)
{
slapi_log_error(SLAPI_LOG_FATAL, REPLICATION_SUBSYSTEM,
"%s Replicated Add received with Control_UUID=%s and Entry_UUID=%s.\n",
sessionid, target_uuid,entry_uuid);
}
slapi_ch_free ((void**)&entry_uuid);
}
}
}
}
else
{
PR_ASSERT(0); /* JCMREPL - A Replicated Operation with no Repl Baggage control... What does that mean? */
}
}
else
{
/* Replicated & Fixup Operation */
}
}
else
{
slapi_operation_set_csngen_handler ( op, (void*)replica_generate_next_csn );
}
copy_operation_parameters(pb);
return 0;
}
int
multimaster_preop_delete (Slapi_PBlock *pb)
{
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
int is_legacy_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
/* If there is no replica or it is a legacy consumer - we don't need to continue.
Legacy plugin is handling 4.0 consumer code */
/* but if it is legacy, csngen_handler needs to be assigned here */
is_legacy_operation =
operation_is_flag_set(op,OP_FLAG_LEGACY_REPLICATION_DN);
if (is_legacy_operation)
{
copy_operation_parameters(pb);
slapi_operation_set_replica_attr_handler ( op, (void*)replica_get_attr );
slapi_operation_set_csngen_handler(op,
(void*)replica_generate_next_csn);
return 0;
}
if (!is_mmr_replica (pb))
{
copy_operation_parameters(pb);
return 0;
}
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
if(is_replicated_operation)
{
if(!is_fixup_operation)
{
LDAPControl **ctrlp;
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_pblock_get(pb, SLAPI_REQCONTROLS, &ctrlp);
if (NULL != ctrlp)
{
CSN *csn = NULL;
char *target_uuid = NULL;
int drc = decode_NSDS50ReplUpdateInfoControl(ctrlp, &target_uuid, NULL, &csn, NULL /* modrdn_mods */);
if (-1 == drc)
{
slapi_log_error(SLAPI_LOG_FATAL, REPLICATION_SUBSYSTEM,
"%s An error occurred while decoding the replication update "
"control - Delete\n", sessionid);
}
else if (1 == drc)
{
/* we don't want to process replicated operations with csn smaller
than the corresponding csn in the consumer's ruv */
if (!process_operation (pb, csn))
{
slapi_send_ldap_result(pb, LDAP_SUCCESS, 0,
"replication operation not processed, replica unavailable "
"or csn ignored", 0, 0);
slapi_log_error(SLAPI_LOG_REPL, REPLICATION_SUBSYSTEM,
"%s replication operation not processed, replica unavailable "
"or csn ignored\n", sessionid);
csn_free (&csn);
slapi_ch_free ((void**)&target_uuid);
return -1;
}
/*
* For delete operations, we pass the uniqueid of the deleted entry
* to the backend and let it sort out which entry to really delete.
* We also set the operation csn.
*/
operation_set_csn(op, csn);
slapi_pblock_set(pb, SLAPI_TARGET_UNIQUEID, target_uuid);
}
}
else
{
PR_ASSERT(0); /* JCMREPL - A Replicated Operation with no Repl Baggage control... What does that mean? */
}
}
else
{
/* Replicated & Fixup Operation */
}
}
else
{
slapi_operation_set_csngen_handler ( op, (void*)replica_generate_next_csn );
}
copy_operation_parameters(pb);
slapi_operation_set_replica_attr_handler ( op, (void*)replica_get_attr );
return 0;
}
int
multimaster_preop_modify (Slapi_PBlock *pb)
{
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
int is_legacy_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
/* If there is no replica or it is a legacy consumer - we don't need to continue.
Legacy plugin is handling 4.0 consumer code */
/* but if it is legacy, csngen_handler needs to be assigned here */
is_legacy_operation =
operation_is_flag_set(op,OP_FLAG_LEGACY_REPLICATION_DN);
if (is_legacy_operation)
{
copy_operation_parameters(pb);
slapi_operation_set_csngen_handler(op,
(void*)replica_generate_next_csn);
return 0;
}
if (!is_mmr_replica (pb))
{
copy_operation_parameters(pb);
return 0;
}
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
if(is_replicated_operation)
{
if(!is_fixup_operation)
{
LDAPControl **ctrlp;
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_pblock_get(pb, SLAPI_REQCONTROLS, &ctrlp);
if (NULL != ctrlp)
{
CSN *csn = NULL;
char *target_uuid = NULL;
int drc = decode_NSDS50ReplUpdateInfoControl(ctrlp, &target_uuid, NULL, &csn, NULL /* modrdn_mods */);
if (-1 == drc)
{
slapi_log_error(SLAPI_LOG_FATAL, REPLICATION_SUBSYSTEM,
"%s An error occurred while decoding the replication update "
"control- Modify\n", sessionid);
}
else if (1 == drc)
{
/* we don't want to process replicated operations with csn smaller
than the corresponding csn in the consumer's ruv */
if (!process_operation (pb, csn))
{
slapi_send_ldap_result(pb, LDAP_SUCCESS, 0,
"replication operation not processed, replica unavailable "
"or csn ignored", 0, 0);
slapi_log_error(SLAPI_LOG_REPL, REPLICATION_SUBSYSTEM,
"%s replication operation not processed, replica unavailable "
"or csn ignored\n", sessionid);
csn_free (&csn);
slapi_ch_free ((void**)&target_uuid);
return -1;
}
/*
* For modify operations, we pass the uniqueid of the modified entry
* to the backend and let it sort out which entry to really modify.
* We also set the operation csn.
*/
operation_set_csn(op, csn);
slapi_pblock_set(pb, SLAPI_TARGET_UNIQUEID, target_uuid);
}
}
else
{
PR_ASSERT(0); /* JCMREPL - A Replicated Operation with no Repl Baggage control... What does that mean? */
}
}
else
{
/* Replicated & Fixup Operation */
}
}
else
{
slapi_operation_set_csngen_handler ( op, (void*)replica_generate_next_csn );
}
copy_operation_parameters(pb);
return 0;
}
int
multimaster_preop_modrdn (Slapi_PBlock *pb)
{
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
int is_legacy_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
/* If there is no replica or it is a legacy consumer - we don't need to continue.
Legacy plugin is handling 4.0 consumer code */
/* but if it is legacy, csngen_handler needs to be assigned here */
is_legacy_operation =
operation_is_flag_set(op,OP_FLAG_LEGACY_REPLICATION_DN);
if (is_legacy_operation)
{
copy_operation_parameters(pb);
slapi_operation_set_csngen_handler(op,
(void*)replica_generate_next_csn);
return 0;
}
if (!is_mmr_replica (pb))
{
copy_operation_parameters(pb);
return 0;
}
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
if(is_replicated_operation)
{
if(!is_fixup_operation)
{
LDAPControl **ctrlp;
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_pblock_get(pb, SLAPI_REQCONTROLS, &ctrlp);
if (NULL != ctrlp)
{
CSN *csn = NULL;
char *target_uuid = NULL;
char *newsuperior_uuid = NULL;
LDAPMod **modrdn_mods = NULL;
int drc = decode_NSDS50ReplUpdateInfoControl(ctrlp, &target_uuid, &newsuperior_uuid,
&csn, &modrdn_mods);
if (-1 == drc)
{
slapi_log_error(SLAPI_LOG_FATAL, REPLICATION_SUBSYSTEM,
"%s An error occurred while decoding the replication update "
"control - ModRDN\n", sessionid);
}
else if (1 == drc)
{
/*
* For modrdn operations, we pass the uniqueid of the entry being
* renamed to the backend and let it sort out which entry to really
* rename. We also set the operation csn, and if the newsuperior_uuid
* was sent, we decode that as well.
*/
struct slapi_operation_parameters *op_params;
/* we don't want to process replicated operations with csn smaller
than the corresponding csn in the consumer's ruv */
if (!process_operation (pb, csn))
{
slapi_send_ldap_result(pb, LDAP_SUCCESS, 0,
"replication operation not processed, replica unavailable "
"or csn ignored", 0, 0);
csn_free (&csn);
slapi_ch_free ((void**)&target_uuid);
slapi_ch_free ((void**)&newsuperior_uuid);
ldap_mods_free (modrdn_mods, 1);
return -1;
}
operation_set_csn(op, csn);
slapi_pblock_set(pb, SLAPI_TARGET_UNIQUEID, target_uuid);
slapi_pblock_get( pb, SLAPI_OPERATION_PARAMETERS, &op_params );
op_params->p.p_modrdn.modrdn_newsuperior_address.uniqueid= newsuperior_uuid; /* JCMREPL - Not very elegant */
}
/*
* The replicated modrdn operation may also contain a sequence
* that contains side effects of the modrdn operation, e.g. the
* modifiersname and modifytimestamp are updated.
*/
if (NULL != modrdn_mods)
{
LDAPMod **mods;
Slapi_Mods smods;
int i;
slapi_pblock_get(pb, SLAPI_MODIFY_MODS, &mods);
slapi_mods_init_passin(&smods, mods);
for (i = 0; NULL != modrdn_mods[i]; i++)
{
slapi_mods_add_ldapmod(&smods, modrdn_mods[i]); /* Does not copy mod */
}
mods = slapi_mods_get_ldapmods_passout(&smods);
slapi_pblock_set(pb, SLAPI_MODIFY_MODS, mods);
slapi_mods_done(&smods);
slapi_ch_free((void **)&modrdn_mods); /* Free container only - contents are referred to by array "mods" */
}
}
else
{
PR_ASSERT(0); /* JCMREPL - A Replicated Operation with no Repl Baggage control... What does that mean? */
}
}
else
{
/* Replicated & Fixup Operation */
}
}
else
{
slapi_operation_set_csngen_handler ( op, (void*)replica_generate_next_csn );
}
copy_operation_parameters(pb);
return 0;
}
int
multimaster_preop_search (Slapi_PBlock *pb)
{
return 0;
}
int
multimaster_preop_compare (Slapi_PBlock *pb)
{
return 0;
}
static void
purge_entry_state_information (Slapi_PBlock *pb)
{
CSN *purge_csn;
Object *repl_obj;
Replica *replica;
/* we don't want to trim RUV tombstone because we will
deadlock with ourself */
if (ruv_tombstone_op (pb))
return;
repl_obj = replica_get_replica_for_op(pb);
if (NULL != repl_obj)
{
replica = object_get_data(repl_obj);
if (NULL != replica)
{
purge_csn = replica_get_purge_csn(replica);
}
if (NULL != purge_csn)
{
Slapi_Entry *e;
int optype;
slapi_pblock_get(pb, SLAPI_OPERATION_TYPE, &optype);
switch (optype)
{
case SLAPI_OPERATION_MODIFY:
slapi_pblock_get(pb, SLAPI_MODIFY_EXISTING_ENTRY, &e);
break;
case SLAPI_OPERATION_MODRDN:
/* XXXggood - the following always gives a NULL entry - why? */
slapi_pblock_get(pb, SLAPI_MODRDN_EXISTING_ENTRY, &e);
break;
case SLAPI_OPERATION_DELETE:
slapi_pblock_get(pb, SLAPI_DELETE_EXISTING_ENTRY, &e);
break;
default:
e = NULL; /* Don't purge on ADD - not needed */
break;
}
if (NULL != e)
{
char csn_str[CSN_STRSIZE];
entry_purge_state_information(e, purge_csn);
/* conntion is always null */
slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
"Purged state information from entry %s up to "
"CSN %s\n", slapi_entry_get_dn(e),
csn_as_string(purge_csn, PR_FALSE, csn_str));
}
csn_free(&purge_csn);
}
object_release(repl_obj);
}
}
int
multimaster_bepreop_add (Slapi_PBlock *pb)
{
int rc= 0;
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
/* For replicated operations, apply URP algorithm */
if (is_replicated_operation && !is_fixup_operation)
{
rc = urp_add_operation(pb);
}
return rc;
}
int
multimaster_bepreop_delete (Slapi_PBlock *pb)
{
int rc= 0;
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
/* For replicated operations, apply URP algorithm */
if(is_replicated_operation && !is_fixup_operation)
{
rc = urp_delete_operation(pb);
}
return rc;
}
int
multimaster_bepreop_modify (Slapi_PBlock *pb)
{
int rc= 0;
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
/* For replicated operations, apply URP algorithm */
if(is_replicated_operation && !is_fixup_operation)
{
rc = urp_modify_operation(pb);
}
/* Clean up old state information */
purge_entry_state_information(pb);
return rc;
}
int
multimaster_bepreop_modrdn (Slapi_PBlock *pb)
{
int rc= 0;
Slapi_Operation *op;
int is_replicated_operation;
int is_fixup_operation;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
is_fixup_operation= operation_is_flag_set(op,OP_FLAG_REPL_FIXUP);
/* For replicated operations, apply URP algorithm */
if(is_replicated_operation && !is_fixup_operation)
{
rc = urp_modrdn_operation(pb);
}
/* Clean up old state information */
purge_entry_state_information(pb);
return rc;
}
int
multimaster_bepostop_modrdn (Slapi_PBlock *pb)
{
Slapi_Operation *op;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
if ( ! operation_is_flag_set (op, OP_FLAG_REPL_FIXUP) )
{
urp_post_modrdn_operation (pb);
}
return 0;
}
int
multimaster_bepostop_delete (Slapi_PBlock *pb)
{
Slapi_Operation *op;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
if ( ! operation_is_flag_set (op, OP_FLAG_REPL_FIXUP) )
{
urp_post_delete_operation (pb);
}
return 0;
}
/* postop - write to changelog */
int
multimaster_postop_bind (Slapi_PBlock *pb)
{
return 0;
}
int
multimaster_postop_add (Slapi_PBlock *pb)
{
return process_postop(pb);
}
int
multimaster_postop_delete (Slapi_PBlock *pb)
{
return process_postop(pb);
}
int
multimaster_postop_modify (Slapi_PBlock *pb)
{
return process_postop(pb);
}
int
multimaster_postop_modrdn (Slapi_PBlock *pb)
{
return process_postop(pb);
}
/* Helper functions */
/*
* This function makes a copy of the operation parameters
* and stashes them in the consumer operation extension.
* This is where the 5.0 Change Log will get the operation
* details from.
*/
static void
copy_operation_parameters(Slapi_PBlock *pb)
{
Slapi_Operation *op = NULL;
struct slapi_operation_parameters *op_params;
supplier_operation_extension *opext;
Object *repl_obj;
Replica *replica;
repl_obj = replica_get_replica_for_op (pb);
/* we are only interested in the updates to replicas */
if (repl_obj)
{
/* we only save the original operation parameters for replicated operations
since client operations don't go through urp engine and pblock data can be logged */
slapi_pblock_get( pb, SLAPI_OPERATION, &op );
PR_ASSERT (op);
replica = (Replica*)object_get_data (repl_obj);
PR_ASSERT (replica);
opext = (supplier_operation_extension*) repl_sup_get_ext (REPL_SUP_EXT_OP, op);
if (operation_is_flag_set(op,OP_FLAG_REPLICATED) &&
!operation_is_flag_set(op, OP_FLAG_REPL_FIXUP))
{
slapi_pblock_get (pb, SLAPI_OPERATION_PARAMETERS, &op_params);
opext->operation_parameters= operation_parameters_dup(op_params);
}
/* this condition is needed to avoid re-entering lock when
ruv state is updated */
if (!operation_is_flag_set(op, OP_FLAG_REPL_FIXUP))
{
/* save replica generation in case it changes */
opext->repl_gen = replica_get_generation (replica);
}
object_release (repl_obj);
}
}
/*
* Helper function: update the RUV so that it reflects the
* locally-processed update. This is called for both replicated
* and non-replicated operations.
*/
static void
update_ruv_component(Replica *replica, CSN *opcsn, Slapi_PBlock *pb)
{
PRBool legacy;
char *purl;
if (!replica || !opcsn)
return;
/* Replica configured, so update its ruv */
legacy = replica_is_legacy_consumer (replica);
if (legacy)
purl = replica_get_legacy_purl (replica);
else
purl = (char*)replica_get_purl_for_op (replica, pb, opcsn);
replica_update_ruv(replica, opcsn, purl);
if (legacy)
{
slapi_ch_free ((void**)&purl);
}
}
/*
* Write the changelog. Note: it is an error to call write_changelog_and_ruv() for fixup
* operations. The caller should avoid calling this function if the operation is
* a fixup op.
* Also update the ruv - we need to do this while we have the replica lock acquired
* so that the csn is written to the changelog and the ruv is updated with the csn
* in one atomic operation - if there is no changelog, we still need to update
* the ruv (e.g. for consumers)
*/
static int
write_changelog_and_ruv (Slapi_PBlock *pb)
{
int rc;
slapi_operation_parameters *op_params = NULL;
Object *repl_obj;
int return_value = 0;
Replica *r;
/* we only log changes for operations applied to a replica */
repl_obj = replica_get_replica_for_op (pb);
if (repl_obj == NULL)
return 0;
r = (Replica*)object_get_data (repl_obj);
PR_ASSERT (r);
if (replica_is_flag_set (r, REPLICA_LOG_CHANGES) &&
(cl5GetState () == CL5_STATE_OPEN))
{
supplier_operation_extension *opext = NULL;
const char *repl_name;
char *repl_gen;
Slapi_Operation *op;
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
opext = (supplier_operation_extension*) repl_sup_get_ext (REPL_SUP_EXT_OP, op);
PR_ASSERT (opext);
/* get replica generation and replica name to pass to the write function */
repl_name = replica_get_name (r);
repl_gen = opext->repl_gen;
PR_ASSERT (repl_name && repl_gen);
/* for replicated operations, we log the original, non-urp data which is
saved in the operation extension */
if (operation_is_flag_set(op,OP_FLAG_REPLICATED))
{
PR_ASSERT (opext->operation_parameters);
op_params = opext->operation_parameters;
}
else /* since client operations don't go through urp, we log the operation data in pblock */
{
Slapi_Entry *e = NULL;
const char *uniqueid = NULL;
slapi_pblock_get (pb, SLAPI_OPERATION_PARAMETERS, &op_params);
PR_ASSERT (op_params);
/* need to set uniqueid operation parameter */
/* we try to use the appropriate entry (pre op or post op)
depending on the type of operation (add, delete, modify)
However, in some cases, the backend operation may fail in
a non fatal way (e.g. attempt to remove an attribute value
that does not exist) but we still need to log the change.
So, the POST_OP entry may not have been set in the FE modify
code. In that case, we use the PRE_OP entry.
*/
slapi_pblock_get (pb, SLAPI_ENTRY_POST_OP, &e);
if ((e == NULL) ||
(op_params->operation_type == SLAPI_OPERATION_DELETE))
{
slapi_pblock_get (pb, SLAPI_ENTRY_PRE_OP, &e);
}
PR_ASSERT (e);
uniqueid = slapi_entry_get_uniqueid (e);
PR_ASSERT (uniqueid);
op_params->target_address.uniqueid = slapi_ch_strdup (uniqueid);
}
/* we might have stripped all the mods - in that case we do not
log the operation */
if (op_params->operation_type != SLAPI_OPERATION_MODIFY ||
op_params->p.p_modify.modify_mods != NULL)
{
if (cl5_is_diskfull() && !cl5_diskspace_is_available())
{
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
"write_changelog_and_ruv: Skipped due to DISKFULL\n");
return 0;
}
rc = cl5WriteOperation(repl_name, repl_gen, op_params,
!operation_is_flag_set(op, OP_FLAG_REPLICATED));
if (rc != CL5_SUCCESS)
{
char csn_str[CSN_STRSIZE];
/* ONREPL - log error */
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name,
"write_changelog_and_ruv: can't add a change for "
"%s (uniqid: %s, optype: %u) to changelog csn %s\n",
op_params->target_address.dn,
op_params->target_address.uniqueid,
op_params->operation_type,
csn_as_string(op_params->csn, PR_FALSE, csn_str));
return_value = 1;
}
}
if (!operation_is_flag_set(op,OP_FLAG_REPLICATED))
{
slapi_ch_free((void**)&op_params->target_address.uniqueid);
}
}
/*
This was moved because we need to write the changelog and update
the ruv in one atomic operation - I have seen cases where the inc
protocol thread interrupts this thread between the time the changelog
is written and the ruv is updated - this causes confusion in several
places, especially in _cl5SkipReplayEntry since it cannot find the csn it
just read from the changelog in either the supplier or consumer ruv
*/
if (0 == return_value) {
Slapi_Operation *op;
CSN *opcsn;
slapi_pblock_get( pb, SLAPI_OPERATION, &op );
opcsn = operation_get_csn(op);
update_ruv_component(r, opcsn, pb);
}
object_release (repl_obj);
return return_value;
}
/*
* Postop processing - write the changelog if the operation resulted in
* an LDAP_SUCCESS result code, update the RUV, and notify the replication
* agreements about the change.
* If the result code is not LDAP_SUCCESS, then cancel the operation CSN.
*/
static int
process_postop (Slapi_PBlock *pb)
{
int rc = LDAP_SUCCESS;
Slapi_Operation *op;
Slapi_Backend *be;
int is_replicated_operation = 0;
CSN *opcsn = NULL;
char sessionid[REPL_SESSION_ID_SIZE];
/* we just let fixup operations through */
slapi_pblock_get( pb, SLAPI_OPERATION, &op );
if ((operation_is_flag_set(op, OP_FLAG_REPL_FIXUP)) ||
(operation_is_flag_set(op, OP_FLAG_TOMBSTONE_ENTRY)))
{
return 0;
}
/* ignore operations intended for chaining backends - they will be
replicated back to us or should be ignored anyway
replicated operations should be processed normally, as they should
be going to a local backend */
is_replicated_operation= operation_is_flag_set(op,OP_FLAG_REPLICATED);
slapi_pblock_get(pb, SLAPI_BACKEND, &be);
if (!is_replicated_operation &&
slapi_be_is_flag_set(be,SLAPI_BE_FLAG_REMOTE_DATA))
{
return 0;
}
get_repl_session_id (pb, sessionid, &opcsn);
slapi_pblock_get(pb, SLAPI_RESULT_CODE, &rc);
/*
* Don't abandon writing changelog since we'd do everything
* possible to keep the changelog in sync with the backend
* db which was committed before this function was called.
*
* if (rc == LDAP_SUCCESS && !slapi_op_abandoned(pb))
*/
if (rc == LDAP_SUCCESS)
{
rc = write_changelog_and_ruv(pb);
if (rc == 0)
{
agmtlist_notify_all(pb);
}
else
{
slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name, "%s process postop: error writing changelog and ruv\n", sessionid);
}
}
else if (opcsn)
{
rc = cancel_opcsn (pb);
/* Don't try to get session id since conn is always null */
slapi_log_error(SLAPI_LOG_REPL, repl_plugin_name,
"%s process postop: canceling operation csn\n", sessionid);
}
/* the target unique id is set in the modify_preop above, so
we need to free it */
/* The following bunch of frees code does not belong to this place
* but rather to operation_free who should be responsible for calling
* operation_parameters_free and it doesn't. I guess this is like this
* because several crashes happened in the past regarding some opparams
* that were getting individually freed before they should. Whatever
* the case, this is not the place and we should make sure that this
* code gets removed for 5.next and substituted by the strategy (operation_free).
* For 5.0, such change is too risky, so this will be done here */
if (is_replicated_operation)
{
slapi_operation_parameters *op_params = NULL;
int optype = 0;
/* target uid and csn are set for all repl operations. Free them */
char *target_uuid = NULL;
slapi_pblock_get(pb, SLAPI_OPERATION_TYPE, &optype);
slapi_pblock_get(pb, SLAPI_TARGET_UNIQUEID, &target_uuid);
slapi_pblock_set(pb, SLAPI_TARGET_UNIQUEID, NULL);
slapi_ch_free((void**)&target_uuid);
if (optype == SLAPI_OPERATION_ADD) {
slapi_pblock_get( pb, SLAPI_OPERATION_PARAMETERS, &op_params );
slapi_ch_free((void **) &op_params->p.p_add.parentuniqueid);
}
if (optype == SLAPI_OPERATION_MODRDN) {
slapi_pblock_get( pb, SLAPI_OPERATION_PARAMETERS, &op_params );
slapi_ch_free((void **) &op_params->p.p_modrdn.modrdn_newsuperior_address.uniqueid);
}
}
if (NULL == opcsn)
opcsn = operation_get_csn(op);
if (opcsn)
csn_free(&opcsn);
return rc;
}
/*
* Cancel an operation CSN. This removes it from any CSN pending lists.
* This function is called when a previously-generated CSN will not
* be needed, e.g. if the update operation produced an error.
*/
static int
cancel_opcsn (Slapi_PBlock *pb)
{
Object *repl_obj;
Slapi_Operation *op = NULL;
PR_ASSERT (pb);
repl_obj = replica_get_replica_for_op (pb);
slapi_pblock_get(pb, SLAPI_OPERATION, &op);
PR_ASSERT (op);
if (repl_obj)
{
Replica *r;
Object *gen_obj;
CSNGen *gen;
CSN *opcsn;
r = (Replica*)object_get_data (repl_obj);
PR_ASSERT (r);
opcsn = operation_get_csn(op);
if (!operation_is_flag_set(op,OP_FLAG_REPLICATED))
{
/* get csn generator for the replica */
gen_obj = replica_get_csngen (r);
PR_ASSERT (gen_obj);
gen = (CSNGen*)object_get_data (gen_obj);
if (NULL != opcsn)
{
csngen_abort_csn (gen, operation_get_csn(op));
}
object_release (gen_obj);
}
else if (!operation_is_flag_set(op,OP_FLAG_REPL_FIXUP))
{
Object *ruv_obj;
ruv_obj = replica_get_ruv (r);
PR_ASSERT (ruv_obj);
ruv_cancel_csn_inprogress ((RUV*)object_get_data (ruv_obj), opcsn);
object_release (ruv_obj);
}
object_release (repl_obj);
}
return 0;
}
/*
* Return non-zero if the target entry DN is the DN of the RUV tombstone
* entry.
* The entry has rdn of nsuniqueid = ffffffff-ffffffff-ffffffff-ffffffff
*/
static int
ruv_tombstone_op (Slapi_PBlock *pb)
{
char *uniqueid;
int rc;
slapi_pblock_get (pb, SLAPI_TARGET_UNIQUEID, &uniqueid);
rc = uniqueid && strcasecmp (uniqueid, RUV_STORAGE_ENTRY_UNIQUEID) == 0;
return rc;
}
/* we don't want to process replicated operations with csn smaller
than the corresponding csn in the consumer's ruv */
static PRBool
process_operation (Slapi_PBlock *pb, const CSN *csn)
{
Object *r_obj;
Replica *r;
Object *ruv_obj;
RUV *ruv;
int rc;
r_obj = replica_get_replica_for_op(pb);
if (r_obj == NULL)
{
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "%s process_operation: "
"can't locate replica for the replicated operation\n",
sessionid );
return PR_FALSE;
}
r = (Replica*)object_get_data (r_obj);
PR_ASSERT (r);
ruv_obj = replica_get_ruv (r);
PR_ASSERT (ruv_obj);
ruv = (RUV*)object_get_data (ruv_obj);
PR_ASSERT (ruv);
rc = ruv_add_csn_inprogress (ruv, csn);
object_release (ruv_obj);
object_release (r_obj);
return (rc == RUV_SUCCESS);
}
static PRBool
is_mmr_replica (Slapi_PBlock *pb)
{
Object *r_obj;
Replica *r;
PRBool mmr;
r_obj = replica_get_replica_for_op(pb);
if (r_obj == NULL)
{
return PR_FALSE;
}
r = (Replica*)object_get_data (r_obj);
PR_ASSERT (r);
mmr = !replica_is_legacy_consumer (r);
object_release (r_obj);
return mmr;
}
static const char *replica_get_purl_for_op (const Replica *r, Slapi_PBlock *pb, const CSN *opcsn)
{
int is_replicated_op;
const char *purl;
slapi_pblock_get(pb, SLAPI_IS_MMR_REPLICATED_OPERATION, &is_replicated_op);
if (!is_replicated_op)
{
purl = multimaster_get_local_purl();
}
else
{
/* Get the appropriate partial URL from the supplier RUV */
Slapi_Connection *conn;
consumer_connection_extension *connext;
slapi_pblock_get(pb, SLAPI_CONNECTION, &conn);
connext = (consumer_connection_extension *)repl_con_get_ext(
REPL_CON_EXT_CONN, conn);
if (NULL == connext || NULL == connext->supplier_ruv)
{
char sessionid[REPL_SESSION_ID_SIZE];
get_repl_session_id (pb, sessionid, NULL);
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "%s replica_get_purl_for_op: "
"cannot obtain consumer connection extension or supplier_ruv.\n",
sessionid);
}
else
{
purl = ruv_get_purl_for_replica(connext->supplier_ruv,
csn_get_replicaid(opcsn));
}
}
return purl;
}
#ifdef NOTUSED
/* ONREPL at the moment, I decided not to trim copiedFrom and copyingFrom
attributes when sending operation to replicas. This is because, each
operation results in a state information stored in the database and
if we don't replay all operations we will endup with state inconsistency.
Keeping the function just in case
*/
static void strip_legacy_info (slapi_operation_parameters *op_params)
{
switch (op_params->operation_type)
{
case SLAPI_OPERATION_ADD:
slapi_entry_delete_values_sv(op_params->p.p_add.target_entry,
type_copiedFrom, NULL);
slapi_entry_delete_values_sv(op_params->p.p_add.target_entry,
type_copyingFrom, NULL);
break;
case SLAPI_OPERATION_MODIFY:
{
Slapi_Mods smods;
LDAPMod *mod;
slapi_mods_init_byref(&smods, op_params->p.p_modify.modify_mods);
mod = slapi_mods_get_first_mod(&smods);
while (mod)
{
/* modify just to update copiedFrom or copyingFrom attribute
does not contain modifiersname or modifytime - so we don't
have to strip them */
if (strcasecmp (mod->mod_type, type_copiedFrom) == 0 ||
strcasecmp (mod->mod_type, type_copyingFrom) == 0)
slapi_mods_remove(&smods);
mod = slapi_mods_get_next_mod(&smods);
}
op_params->p.p_modify.modify_mods = slapi_mods_get_ldapmods_passout (&smods);
slapi_mods_done (&smods);
break;
}
default: break;
}
}
#endif
/* this function is called when state of a backend changes */
void
multimaster_be_state_change (void *handle, char *be_name, int old_be_state, int new_be_state)
{
Object *r_obj;
Replica *r;
/* check if we have replica associated with the backend */
r_obj = replica_get_for_backend (be_name);
if (r_obj == NULL)
return;
r = (Replica*)object_get_data (r_obj);
PR_ASSERT (r);
if (new_be_state == SLAPI_BE_STATE_ON)
{
/* backend came back online - restart replication */
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "multimaster_be_state_change: "
"replica %s is coming online; enabling replication\n",
slapi_sdn_get_ndn (replica_get_root (r)));
replica_enable_replication (r);
}
else if (new_be_state == SLAPI_BE_STATE_OFFLINE)
{
/* backend is about to be taken down - disable replication */
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "multimaster_be_state_change: "
"replica %s is going offline; disabling replication\n",
slapi_sdn_get_ndn (replica_get_root (r)));
replica_disable_replication (r, r_obj);
}
else if (new_be_state == SLAPI_BE_STATE_DELETE)
{
/* backend is about to be removed - disable replication */
if (old_be_state == SLAPI_BE_STATE_ON)
{
slapi_log_error(SLAPI_LOG_FATAL, repl_plugin_name, "multimaster_be_state_change: "
"replica %s is about to be deleted; disabling replication\n",
slapi_sdn_get_ndn (replica_get_root (r)));
replica_disable_replication (r, r_obj);
}
}
object_release (r_obj);
}
#ifdef NOTUSED
/* Keeping the function just in case */
static void
close_changelog_for_replica (Object *r_obj)
{
if (cl5GetState () == CL5_STATE_OPEN)
cl5CloseDB (r_obj);
}
#endif
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